Liebert Nfinity 208 User Manual

English

4 to 16 kVA

Power System

208 V / 240 V 60Hz

User Manual

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS.

This manual contains important instructions that
should be closely followed during installation
and maintenance of this UPS unit and during the
installation and replacement of power and
battery modules.

This product is designed for Commercial /
Industrial use only. This product is not intended
for use with life support and other U.S. FDA
designated “critical” devices. Maximum load
must not exceed that shown on the UPS rating
label. See Limited Warranty.

WARNING: Lethal voltages may be present
within this unit even when it is apparently not
operating. Observe all cautions and warnings in
this manual. Failure to do so MAY result in
serious injury or death. Never work alone.

Observe the following precautions when working
with batteries:

§ CAUTION: DO NOT dispose of battery
modules in a fire; the battery module may
explode.

§ CAUTION: DO NOT open or mutilate
batteries; released electrolyte is harmful to
skin and eyes, and may be toxic.

§ CAUTION: A battery can present a risk of
electrical shock and high short circuit
current. The following precautions should
be observed when working on batteries:

§ Remove watches, rings or other metal

objects.

§ Use tools with insulated handles.

§ CAUTION: Lead-acid batteries contain

hazardous toxic materials. Handle,
transport, and recycle in accordance with
local regulations.

This UPS is designed for use on a properly
grounded (earthed), 208/240 VAC, 60Hz supply,
and is to be installed by qualified personnel.

ELECTROMAGNETIC COMPATIBILITY - The
Nfinity™ UPS complies with the limits for a
Class A digital device, pursuant to Part 15 of
FCC rules. These limits provide reasonable
protection against harmful interference in a
commercial environment. This device
generates, uses, and radiates radio frequency
energy and, if not installed and used in
accordance with the instruction manual, may
cause harmful interference to radio
communications. Operating this device in a
residential area is likely to cause harmful
interference, which the user must correct at their
own expense.

Operate the UPS in an indoor environment only
in an ambient temperature range of 0°C to
+40°C (32°F to +104°F). Install it in a clean
environment, free from conductive
contaminates, moisture, flammable liquids,
gasses, or corrosive substances.

Turn the UPS off and isolate the UPS before
cleaning. Use only a soft cloth, never liquid or
aerosol cleaners. Keep the front and rear vents
free of dust accumulation that could restrict
airflow.

Never block or insert any object into the
ventilation holes or other openings.

This UPS contains user replaceable modules.
No attempts should be made to access the
interior of any module. See troubleshooting
section on module replacement.

1

Glossary of Symbols

2

3

Introduction

General Description

Modes of Operation

Major Components

General Description

Congratulations on your purchase of Liebert’s
Nfinity™ Uninterruptible Power System. As with
every Liebert product, we stand behind our
quality. If you have any questions concerning
this UPS, please feel free to contact your local
sales representative, or call the appropriate
Technical Support number listed in the back of
this manual.

To ensure proper installation and operation of
this unit, please read this manual thoroughly.

SYSTEM DESCRIPTION

The Liebert Nfinity Power System is a modular
UPS intended for use with workstations, servers,
network, telecom or other sensitive electronic
equipment. It provides continuous, high-quality
AC power to your equipment, protecting it from
any power disturbance due to blackouts,
brownouts, surges or noise interference.
The Nfinity modular UPS was designed to
provide maximum system availability to business
critical equipment. Nfinity is also an easily
adaptable UPS system. By simply installing
additional power or battery modules you can
expand your current system capacity or extend
your back-up runtime.
Nfinity has a comprehensive user interface that
can be configured according to the user’s
preference. It also informs the user of details on
the status of the UPS, and keeps a log of
events.

FEATURES:

§ Up to 16 kVA of modular back-up
power

§ Continuous power conditioning

§ A user-friendly interface for custom

configuration

§ Continuous system monitoring

§ Warning alarms and event logs

STANDARD COMPONENTS:

§ Power Modules – for power
conditioning

§ Battery Modules – for back-up power

§ System Control Modules – for system

monitoring and communications

§ LCD display for comprehensive user
indications and programmable controls

§ Output transformer for isolation

COMMUNICATIONS

§ Dry contacts

§ RS-232

§ Optional communications via

Intellislot™ communication ports

4

5

Modes of Operation

The Nfinity UPS is designed to operate as a true
on-line system in the following modes:

Normal Mode

The Power Module rectifiers derive power from a
utility AC source and supplies regulated DC
power to the inverter. The module’s inverter
regenerates precise AC power to supply the
connected equipment. The battery charger
maintains a float-charge on the battery.

Back-Up Mode

When AC utility fails, the connected equipment
is supplied power by the inverter, which obtains
energy from the battery modules. The output
power equipment will not be interrupted during
the failure or restoration of the AC utility source.

Auto Restart Mode

After a power outage and complete battery
discharge, once the AC utility is restored, the
UPS will automatically restart and resume
supplying power to the connected equipment.
This feature is enabled at the factory, but can be
disabled by the user. The user can also
program two auto restart delay settings:

1. Battery capacity level (%)

2. Countdown timer

Recharge Mode

When AC utility is restored, the unit will then
automatically recharge the battery modules until
they are fully charged.

Bypass Mode

The bypass provides an alternate path for power
to the connected equipment that operates in the
following manner:

Automatic

In the event of an internal failure or should
the inverter overload capacity be exceeded,
the UPS performs an automatic transfer of
the connected equipment from the inverter
to the bypass source.

Manual

Should the UPS need to be taken out of
service for limited maintenance or repair,
manual activation of the bypass will cause
an immediate transfer of the equipment from
the inverter to the bypass source.

6

Major Components

The following is a general description
of each component and its functions.
Please review this section carefully, as
it will give you a better understanding
as to how Nfinity operates.

Unit Frame

Nfinity’s frame houses all of the other
system components. Looking at the
front of Nfinity™, one will see a series
of plastic bezels. By grabbing these
bezels from the side and pulling out,
you will remove the bezel to reveal the
Battery / Power Module bays. The
bottom bezel covers the cooling fans
and the Manual Bypass Switch.

The User Interface Module is located
above the Power / Battery Module bays
for easy access. From here the user
may find out various information about
Nfinity’s condition. By moving the User
Interface and setting it on top of the
frame, you will see the System Control
Module bays.

Nfinity’s frame with bezels removed

7

User Interface Module

The User Interface Module is the primary source of
communication between the UPS and the user.
From the interface, the user can:

§ View the status of the UPS

§ Custom configure the system

§ Review the event log to assist with

troubleshooting

§ Enable / disable the output power

§ Silence the audible alarm

For a more detailed explanation on how to operate
the User Interface module, see the Controls and
Indicators section of this manual.

System Control Module

User Interface Module

System Control Module

The System Control Module is the
communicative backbone of the UPS. It
gathers input from all modules and processes
the data to control the operation of the
system – including monitoring the condition of
each module. An optional second System
Control Module can be installed to provide full
system functionality (operation and
communication), in the unlikely event a
Control Module should fail.

Under normal operation, the Status LED
(green) will blink and the Fault LED (amber)
will be off. For any condition other than this,
check the Troubleshooting section of this
manual.

8

Power Module

Under Normal Operation, the Status LED (green) will blink and the Fault LED (amber) will be off. For any

The Power Module maintains the condition of
power in the Nfinity UPS. Each module is an
independent 4-kVA unit, consisting of a power
factor corrected rectifier, battery charger, and
inverter, with associated monitoring and control­circuitry. The modules are paralleled to provide
greater capacity and/or redundancy. Modules
may be added or replaced on-line with no
interruption or danger to the connected
equipment.

Battery Module

The Battery Modules provide back-up power in
the event of input utility failure. Each module
contains a quantity of ten individual 12-volt valve
regulated (VRLA) battery blocks with associated
monitoring and controls to isolate the battery
module in the event of a battery failure. The
modules are paralleled to provide greater back­up time and/or redundancy. Modules may be
added or replaced on-line with no interruption or
danger to the connected equipment.

Power Module Battery Module

condition other than this, check the Troubleshooting section of this manual.

9

10

Installation

Preparation

Unloading

Cable Installation

Communications

Preparation

These installation instructions provide all the
information needed for positioning the UPS
(including environmental requirements) and for
connecting the input and output power cables.

Inspection

Upon receiving the UPS, examine the packaging
for any signs of mishandling or damage. If any
damage is noted, call your local Liebert
representative and/or notify your carrier.

Environment

Note: Operating in temperatures above 77° F

(25° C) will reduce battery life. The UPS
environment must be free of conductive
contaminants and excessive moisture (water
condensation, flammable vapors, chemical
fumes, or corrosive gasses and liquids).

Required Setup Equipment

The tools below are required in order to properly
setup your UPS:

§ Pallet jack

Site Preparation

When deciding where to locate your UPS,
consider the weight and size of the unit. Make
sure that the structural integrity of the floor can
withstand the weight of a fully loaded unit. Refer
to the table below for size and fully populated
weight considerations:

Model Max Weight H x W x D

8 bay 871 40” x 20” x 28”

12 bay 1186 53” x 20” x 28”

Check to make sure that your UPS will be
located in a well-ventilated area with at least 12
inches behind it. The UPS is force cooled with
the aid of internal cooling fans. Cooling air
enters from the front of the UPS and is
exhausted through ventilation grills in the back.
It should also have at least 36 inches in front, in
order to change modules when necessary.

§ 1/2” (13mm) ratchet or wrench

§ Torque Wrench (in / lb)

§ Flathead Screwdriver

§ #2 Phillips Screwdriver

The unit frame is bolted to the shipping pallet to
ensure safety. It is recommended that a pallet
jack be used to transport the unit to its operating
location (prior to unbolting the unit).

11

Unloading

Unloading the UPS

CAUTION: This UPS is very heavy (see weight

on previous page). At least two people should
be present to unload it off of the pallet.

1. Once the UPS is near the desired operating
location, remove the cardboard cover.

2. Use a ratchet (1/2” or 13mm) or open-ended
wrench to remove the four mounting bolts
from the pallet brackets. Remove mounting
brackets from the pallet and UPS. Keep
brackets for future transportation of UPS, or
for additional stability once in place.

3. Remove the metal ramp from the bottom of
the UPS, rotating it. Fit ramp in pallet slot as
shown above.

4. Using two people, slowly move the UPS
down the ramp until the UPS is on level
ground.

12

5. Once the UPS in its desired location, adjust
the leveling feet to secure its position.

Stationary Mounting

Additional stability can be added by bolting the
mounting brackets (used in shipping) to the
floor.

For greater stability, use a higher-grade bolt.
Refer to the dimensions below when drilling
holes for stationary mounting.

13

Cable Installation

Wiring Preparation

WARNING: Please read this section thoroughly

before attempting to install wiring to this unit.
Be sure that the unit is not connected to any AC
utility power source before installing any wiring
to this unit. This UPS should be installed by a
qualified / certified electrician.

Removing the Cover Plates

On the back of the
UPS, cover plates
are over the input
and output
terminals, as
shown on right.
Remove these
using a Phillips
screwdriver. Keep
screws and plates
to one side.

Configuring the Bypass Voltage (TB2)

The UPS voltage is factory set to 208V. Should
the user have a utility supply of 240V, the
bypass voltage jumper will have to be changed
to ensure correct output voltage.

Power Cable Installation

Refer to the charts below when selecting cables:

Power Cable and Protection Ratings

120V 208V 240V

Max Input
Current
Input
Protection

Max Output
Current

Input / Output
Terminal
Details

90°C rated copper wire is recommended

Notes:

If the start-up is on bypass the UPS has a 3­cycle inrush current that is 6 times the rated
output current. This must be taken into account
when selecting the overload protection device at
the AC input supply distribution point. To avoid
random tripping on start up, it is recommended
that the AC input supply be protected with a
circuit breaker capable of withstanding this initial
inrush.

This UPS is fitted with EMI suppression filters.
Earth leakage current is less than 40mA.
Transient and steady state earth leakage
currents may occur when starting the
equipment. This should be taken into account
when selecting ground current detection
devices, as the earth leakage currents of both
the UPS and load will be carried.

Input and output cables must be run in separate
conduits.

A branch rated overcurrent protection device
(circuit breaker or fused disconnect switch) must
be installed for the AC output.

67A /

phase

79 A

69 A

100 A 90 A

77 A

67 A

2 AWG max (35 mm²)
6 AWG min (16 mm²)
Torque Rating: 22-26 in/lb

(2.5-3 nm)

14

Input Wiring (TB1)

UPS contains an isolation
transformer that generates a neutral
conductor for the connected equipment.
The UPS is a separately derived source

o ground bonding
jumper. A grounding electrode conductor
(GEC) must be installed in accordance
with national and local wiring code /

To connect the input wiring, follow these steps:

1. Locate the
input wiring
access,
remove the
knockout
and pull the
three input
wires
through it,
allowing
some slack
for
installation.

2. Secure the conduit to the rear panel of the
UPS.

3. Input Power cables connect to screw
terminals on the Input Terminal Block
located to the right of the Bypass Voltage
Terminal. Connect the wires to the block
connections as shown below. Using a
torque wrench, turn the screws clockwise
until tightened to the proper torque value.
Insert the ground wire through the grounding
lug and tighten it to the proper torque value.

Output Wiring (TB3)

Output wiring may be configured one of two
different ways (240 / 120 or 208 / 120). Refer to
the chart and diagram below when configuring
the output wiring.

Note the Neutral / Ground jumper
on the terminal above.

Voltage 120 208 240

Terminals

Only use the connections listed above. Other connections
will produce non-standard voltages.

The Nfinity

1, 4
3, 4

2, 3

1, 3

Grounding Conductor Installation

An insulated grounding conductor must be
identical in size, insulation material, and
thickness as the grounded and ungrounded
branch-circuit supply conductors. This cable
must be green with or without one or more
yellow stripes, and is to be installed as part of
the branch circuit that supplies the unit or
system.
The grounding conductor is to be grounded to
earth at the service equipment or, if supplied by
a separately derived system, at the supply
transformer or motor-generator set.

and contains a neutral t

regulations.

15

Connecting to External Panel Boards

UPS Output Panel Board

UPS Output Panel Board

If connected equipment will operate at 240 / 120
VAC, use a standard single-phase panel board.

If connected equipment will ONLY operate at
208 / 120 VAC, use a three-phase panel board.

Ensure that all 120V equipment is connected
L1 – N, L3 – N. Ensure that all 208V equipment is
connected L1 – L2.

Input

Input

REPO Switch

Nfinity is equipped with a Remote Emergency
Power Off (REPO) Switch.

The user must supply a means of interfacing
with the REPO circuit to allow disconnecting
the UPS input feeder breaker to remove all
sources of power to the UPS and connected
equipment to comply with national and local
wiring codes / regulations.

Remove
jumper
before
wiring.

1 = 24V DC, 35 mA
2 = sense
3 = sense
4 = ground

If the installation does not require connection
to a REPO system, the jumper must be
removed.

Caution: To maintain safety (SELV) barriers
and electromagnetic compatibility signal
cables should be segregated and run
separately from power cables.

16

Communication

COM Ports

Nfinity is able to communicate through multiple
communication ports simultaneously.

Pin Assignment

COM 1 – Relay Contacts

Relay contacts are available through a DB-9F
communications connector. Contact closure
provides the following:

Pin Assignment

1 Low Battery (normally open)

UPS shutdown in battery mode

4

(5-12 V DC for 1.5 sec)
5 Common
7 Low Battery (common)
8 On Battery (common)
9 On Battery (normally open)

The contacts are rated 48V DC, 1 Amp
maximum and are compatible with the SiteNet
MultiLink software.

COM 2 – Serial

Nfinity is able to communicate via Liebert
proprietary protocol. The pin-out configuration
of the DB-9 connector is:

Pin Assignment

2 Transmit Data
3 Receive Data
5 Common

Intellislot™ Ports

The following communication cards may be
used with Nfinity:

Intellislot™ SNMP cards – allows the Nfinity
communicate intelligently with your Ethernet
network. The SNMP card must be installed in
port 1; any additional cards can be added in
consecutive ports.

Intellislot™ MultiPort4 cards– allows up to
four client computer systems to simultaneously
monitor the status of Nfinity.

Intellislot™ Relay Contacts cards – provides
contact closures for remote monitoring of alarm
conditions; On Battery, On Bypass, Low Battery,
Summary Alarm, UPS Fault and On UPS
signals. It will integrate with AS400 computers
(additional cable required) and other monitoring
systems.

17

Operating Instructions

Controls and Indicators

Operating Procedures

Main Menu

18

Controls and Indicators

A Warning has occured. Consult event log.

Display Controls

The Front Display Panel informs the user of the status of the UPS, and lets him configure the UPS to his
own needs or preferences through the user interface.

It consists of a series of Status LED’s, a 4 line by 20 character LCD display window, and buttons for
navigation (as displayed above).

Buttons

Refer to the legend below in order to properly
navigate the Nfinity User Interface.

LEDs

Refer to the legend below to indicate occurrence
when an LED is lit.

!

Fault / Warning
Solid­ Flashing-

AC Input

On Bypass

Inverter On

On Battery

AC Output

A UPS fault condition has occured.

- AC utility is available

- The Bypass is supplying the power

- The Inverter is supplying the power

- Battery is supplying power to the inverter

- Power is available to supply the load

19

Status LED Modes

LED Off

LED Flashing

LED On

UPS is Off or Initializing

UPS On, Utility Good and Output Off

UPS On, Utility Good and Output On

(Normal Operation)

UPS On, Utility Bad and Output On

(On Battery Operation)

UPS On, Utility Bad, and Output Off

Unit in Bypass Operation

(Manual or Automatic)

Unit in Manual Bypass Operation with
Utility out of Bypass Operation Range

Shutdown Due to end of Discharge

20

Navigating the Menu

In order to review or change any settings on the
UPS, it must be navigated using the buttons
seen on the previous page. Because some
menus contain more than four rows of
information, you may see an arrow on the
display pointing up or down (as shown below) –
indicating to scroll using the $ or # buttons.

If you are scrolling through any of the main
menus, items will scroll one line at a time with
the menu heading on the top line:

Pressing # reveals:

Note the arrows on the screen indicating that the
user scroll up or down to reveal more
information.

21

Operating Procedures

Start-up and Initialization

Follow these steps in order to start up the UPS.

1. Close Input Circuit Breaker (CB1) and close
the Enable Switch (SW2). Ensure the
manual bypass switch is in UPS position.
You should see the following on the LCD
display window:

2. Press & button.

Manual Transfer to Bypass

In the event of a UPS overload or failure, the
UPS will transfer to bypass via its automatic
bypass switch. It is possible for the user to
manually transfer the UPS to bypass by
operating the manual bypass switch located
behind the lowest front cover to the bypass
position. To transfer the UPS from bypass to
normal mode, simply operate the manual bypass
switch back to the UPS position.

It should be noted that the load is not protected
from utility interruptions when in bypass mode.

3. Press % to access the main menu.

Shutting down the UPS

Use the following procedure to power down the
UPS.

1. Press & to disable power from the
connected equipment.

2. Verify request to disable the output by
pressing %.

3. Turn off the Enable Switch (SW2). Open the
Input Circuit Breaker (CB1).

22

Main Menu

After initialization, the % button will take you to the main menu. From here you may check on the status
of the UPS, review the event and alarm log, configure your UPS, and even receive instructions on
replacing modules. The main menu is divided into five sub-menus as shown below:

Use the $ # buttons to select the desired menu item and press % to access the appropriate sub-menu.

23

UPS Status Screen

From the main menu the user may select UPS Status and press %. Once at the UPS Status Screen, the
user may access any information on the present condition of the UPS. Note the chart below when
reviewing the UPS. Any underlined text indicates measured parameters.

24

UPS Configuration Screen

Main Menu

Review Settings

Follow this procedure to review your UPS
configuration settings. Any underlined text
indicates factory default values.

Follow the menus below by pressing # or $ to
review the settings:

>

UPS Configuration

>

Review Settings

Voltage Settings

Voltage Settings
Input 208/120 LLG

Battery Settings

Battery Settings
Test intervl weeks
on at :

Wed0600

Low Batt Warn : min

Alarm Settings

Alarm Settings

Power:
Max Load: kVA

N+1

2

2

xx.x

Service Contact

Service Contact
Liebert Corp.

1-800-543-2378

25

Change Configuration Settings

Main Menu

Change Settings Menu

Starting from the Main Menu, locate and press
UPS Configuration. From the UPS Configuration
screen, select the Change Settings option. Here
one may configure Nfinity from a large variety of
selections. Items indicated by an asterisk (*) or
underlined are the selected settings.

>

UPS Configuration

>

Set Password: Set a Password to prevent
unauthorized users from changing the
configuration of the Nfinity. It can be up to 7
characters in length. Once set, the password
will be required to change the configuration.

Auto Battery Test: Configure when and how
often the Nfinity’s automatic battery test will run.
This test is designed to ensure Battery system
integrity and warn of early problems.

Change Settings

Input Voltage: Select the required input voltage

setting. This voltage must match the bypass
voltage jumper setting.

Input Voltage
208/120 LLNG

*

208/120 LLNG

Low Battery Warning: Notifies user as to how
much runtime is available. Can be set from 1 to
30 minutes.

26

Auto Restart: Automatically restarts once both

delay parameters (battery capacity percentage
and countdown timer) are met.

Set Date/Time: Allows user to enable DST
(Daylight Savings Time), change the Day, Date
and Time setting on Nfinity. When enabled, the
time will automatically adjust to Daylight
Savings.

User Settings: From here one can enter the
UPS ID or adjust the contrast of the user
interface LCD.

Max Load Alarm Set: Allows an alarm to set
when Nfinity’s load reaches a specific level.

UPS Shutdown Delay: Delays UPS shutdown
for specified amount of time after receiving
shutdown command via communications (serial
or SNMP).

27

Redundant Alarm Set: Sets Alarm to notify

user when redundancy is no longer available.

UPS Test: Allows user to test the Batteries,
LED’s, LCD, or Alarm.

Service Contact: Set a contact for the user to
reach if problems occur.

Remote Shutdown: Enables / Disables the
Remote Communications Shutdown.
If you are using SiteNet™ software, this
parameter should be enabled in order for the
UPS output to be turned off once the operating
system has been shutdown.

External Battery: Sets total amp-hour for
external batteries to provide a more accurate
runtime remaining value on the LCD display and
through communications.

Enter in the following when using the External
Battery Cabinets with Chargers.
(P/N: PB10SLF105WC120)

# Cabinets AH Value

1 0105
2 0210
3 0315
4 0420
5 0525
6 0630

28

Event Log

One may open the Event Log from the main
menu. By accessing the Event Log, the user
may scroll through the Nfinity’s past 255
occurrences in chronological order by pressing

the $ # buttons.

The typical event log screen will display the
event number and reference code on the first
line. The purpose of this code is to assist
factory trained service personnel in
troubleshooting. Please make a note of the
code number when contacting technical support.
The second line contains the event description.
The third line will have either more detail about
the event, a serial number indicating as to which
module the event occurred, or be left blank. The
last line will show the date and time the event
occurred.

Press " to go back to the main menu.
In the event of an event / alarm, the User

Interface LCD will display the last message
regardless of the default screen. A list of
possible event / alarm messages is displayed at
right. If you encounter one of these or other
messages and are unsure of the corrective
action to take, please contact a qualified Liebert
representative at the number listed in the back
of this manual.

For more information regarding events, consult
the troubleshooting section.

Alarm Log

When an alarm sounds, the User Interface LCD
will display a general explanation as to what the
alarm is indicating. These alarms will also be
displayed in the Alarm Log, which will display
the last 32 alarm messages. To view these

messages in chronological order, press the $ #
buttons.

The first line of a typical alarm log screen will
display the reason for the alarm occurrence.
The second line will give a more specific detail
of the occurrence (i.e.; module serial number).

Press " to go back to the main menu.
Below is a list of possible events / alarms.

Occurrence Event Alarm

Battery EOD
Battery Mod Removed
Battery Module Added
Battery Module Fail
Battery Test Fail
Battery Test Pass
Display Panel Added
Display Panel Removed
Firmware Error
General UPS Fail
Main Control Fail with
redundant control
Max Load Alarm
Power Mod Added
Power Mod Failure
Power Mod Removed
Red. Power Alarm
Transformer Fan Fail
UPS Auto Restart
UPS CANBus Fail
UPS Low Battery
UPS on Battery
UPS on Bypass (auto)
UPS on Bypass (manual)
UPS Shutdown
UPS Shutdown Imminent
Wrong Voltage

4
4
4
4 4
4 4
4
4
4
4 4
4 4
4 4

4 4
4
4 4
4
4 4
4 4
4
4 4
4 4
4 4
4 4
4 4
4

4 4

4

29

Module Replacement

For more details on module replacement, consult the troubleshooting section of this user manual.

The user interface also supplies instructions for
removing and replacing modules. From the
main menu, access the module replacement
screen and select the type of module. Refer to
the screens below for reference:

30

Troubleshooting

Module LED Indication

Alarm Messages

Module Replacement

31

Alarm Messages

In the event of an alarm, the User Interface LCD will display the last message regardless of the default
screen. A list of possible alarm messages is displayed below. If you encounter one of these or other
alarm messages and are unsure of the corrective action to take, please contact a qualified Liebert
representative at the number listed in the back of this manual.

Alarm Message

Battery Module Failure Battery Module is no longer working

Power Module Failure A Power Module is no longer working

General UPS Failure The UPS is operating on bypass. Contact a Liebert Global Services at

Battery Test Failed Unit has detected a battery module problem. Verify the battery status via the display

Redundant Power Alarm The UPS is no longer redundant. Replace faulty module to regain

Maximum Load Alarm Maximum load has been exceeded. Insert additional modules to increase

System Control
Module Failure
Firmware version error Firmware is incompatible. Download latest firmware version from

On Battery Load is currently being supplied from UPS. Wait for input AC to return.
Low Battery Battery power is low. Allow batteries time to recharge.
UPS on Bypass (auto) UPS switched to auto bypass. Alarm screen should indicate reason

UPS on Bypass (manual) User switched UPS to manual bypass. When ready, switch back to UPS.
Transformer fan failure The transformer cooling fans are no longer

UPS CanBus Failure The internal communications are not

UPS Shutdown Imminent The UPS is about ready to shut down Check for faulty modules, output

Wrong Voltage The input voltage configuration and bypass

Cause Action

Refer to Module LED indication section

properly.

properly.

System Control Module no longer working
properly.

working properly.

working properly.

jumper settings DO NOT MATCH.

for corrective action.
Replace the faulty Power Module by
following the procedure in this manual.

1-800- 543-2378.

and perform self-battery test.

redundancy.

load capacity or reduce current load.
Replace faulty module.

www.liebert.com.

for auto bypass.

Contact a Liebert Global Services at
1-800- 543-2378.
Contact a Liebert Global Services at
1-800- 543-2378.

overloads, or Contact a Liebert Global
Services at 1-800- 543-2378.
Check to make sure the bypass
voltage matches the input voltage and
ensure the input voltage configuration
matches the bypass jumper setting.

32

Module LED Indication

On every Battery, Power or Control Module are two LEDs to help inform the user of the module status.
Refer to the chart below for Power and Battery Modules:

Status LED

(Green)

OFF

OFF ON Module is initializing (max 10 seconds*).
FLASHING OFF Normal Operation
FLASHING FLASHING Module is in start-up qualification mode, or module warning. **
FLASHING ON Module failed, is off-line and module control is functioning.

OFF FLASHING

ON OFF
ON ON
ON FLASHING

* If this persists for more than 10 seconds, check to verify the lever is in the down position or the module is faulty.
** If both Green and Amber LEDs are flashing for more than 30 seconds, then re-insert module.

Fault LED

( Amber)

OFF

Module Status

Module not inserted into frame.
System is OFF.

Abnormal operation, re-insert module. If this persists, call Liebert Global
Services at 1-800- 543-2378.

33

Module Replacement

Occasionally a control, battery or power module
will need to be removed or replaced. Follow the
instructions below when such an event occurs.
To order additional modules, contact your
Liebert representative or call 1-800-LIEBERT.

Removing Modules

1. Remove bezel cover of appropriate module.
When replacing a Power or Battery Module,
verify the faulty module by confirming the
amber LED is lit.

2. If removing a Control or Power Module with
no redundant modules, switch UPS to
manual bypass.

3. Pull out and lift the lever if replacing a
Control or Power Module, then turn fastener
counter-clockwise until it is loosened.

4. Start to pull out module. About 2/3 out it will
stop. Slide module away from the center of
the UPS. Continue to pull until module is
removed. (Seen at right)
Caution: Battery Modules are heavy (66
lbs, 30 kg). Make sure to use two people
when removing a Battery Module.

5. Dispose of module in an environmentally
responsible way that complies with local
codes / regulations or return to Liebert for
proper disposal.

Note: Battery Modules may contain shipping
screws. These screws may be removed and
discarded.

34

WARNING

POTENTIAL TIP HAZARD

Install all modules starting from
bottom to top bays. For module
removal, start from top to bottom
bays. Do Not remove more than one
module at a time. Failure to do so
may cause unit to tip over and cause
serious injury.

Replacing Modules

1. Lift module to appropriate bay, resting end
of module on bay shelf. Use caution not to
rest the module on the lower bezel cover.

2. Push module into bay. Once half way in,
slide module sideways toward the center of
the UPS. Continue pushing module fully
inserted.

Replacing the User Interface

1. Lift off user interface and set it on top of the
UPS frame.

2. The attached cable will be connected to an
Intellislot card, found in a port between the
control modules.

3. Press and turn fastener clockwise until
locked. If replacing a Control or Power
Module, press lever down.

4. Wait about 15 seconds as the module
performs a start-up test and synchronizes
with the other modules. Both the amber and
green LEDs should be flashing. A green
flashing LED will then confirm the module is
properly connected.

5. If UPS was placed in bypass manually,
transfer back to UPS operation.

6. Replace bezels.

3. Disconnect the cable from the Intellislot
card.

4. Plug the new user interface cable into the
Intellislot card.

5. Set replacement User Interface into proper
position.

35

Scheduled Maintenance

Maintenance

Proper Care

Replacing Fan Filters

36

Maintenance

Proper Care

Keeping your Liebert Nfinity UPS operating
properly is imperative to optimal performance
and life of the unit. It is recommended that a
certified technician perform preventive and
corrective maintenance. Liebert Global Services
(LGS) is dedicated to ensuring the highest level
of performance and unmatched support for your
Nfinity UPS. Contact an LGS representative at
1-800-LIEBERT for services to guarantee
maximum reliability and system availability.

Scheduled Maintenance

It is recommended the following maintenance is
performed at least monthly:

§ Clean unit

§ Clean / replace filters

§ Verify proper airflow

It is recommended the following maintenance is
performed annually:

§ Verify all power modules are operating
properly.

§ Verify all battery modules are operating
properly.

§ Verify redundancy (if applicable).

Replacing Fan Filters

Nfinity’s intake fans contain filters that will need
to be replaced / cleaned periodically, depending
on the surrounding environment. Check by
removing the bottom bezel and noting the
condition of the two filters. If filters are dirty,
replace them by removing the plastic cover over
the filter frame and inserting a new filter in its
place. Use caution when replacing filters when
fans are running.

The fan filters are washable and can be reused.
To wash filters, place them under a running
faucet (with the dirt side down) to remove dirt
and dust. Blot dry with a towel and allow air­drying before reusing.

37

Warranty

Reference

Specifications

Battery Run Times

Technical Support

38

Specifications

General & Environmental Units 4 8 12 16

kVA 4 8 12 16 Unit Rating

kW 2.8 5.6 8.4 11.2
Conducted and Radiated EMC Levels FCC Part 15, Class A
Compliant Safety Standards UL 1778; c-UL
Compliant Immunity Standards IEEE C62.41, Category B

Mechanical Units 8 Bay 12 Bay

Dimensions:

Environmental Units

Operating Temperature (max) F (C) 32° - 104° (0° - 40°)
Relative Humidity 0-95% non-condensing
Maximum operating altitude Ft. (M) 10,000 (3000)
Nominal heat dissipation BTU/Hr 1062 2124 3186 4248
Acoustic noise level dBA <62 @ 1 meter

Input Data Units

Nominal input voltage VAC 170 to 276
Power factor Cos Ø >.98
Input frequency (nominal) Hz 60
Input frequency range Hz 40-70

Battery Module Units

Number of lead acid batteries 10
Number of battery cells 60
Battery capacity A/hr 9

Autonomy time (full load)

Maximum charge current (full load) A 3
Nominal Voltage VDC 120
Recharge Time Hrs 3-5 (to 90% capacity)

Output Data Units

Output voltage VAC 208/120 or 240/120
Voltage regulation % ±3
Voltage stability (100% step load) % ±7
Recovery time msec 96

Voltage distortion:
Output frequency Hz 60

Efficiency at 100% load % 89
Output overload capability %

Width 20 (508.0) 20 (508.0)
Depth 28 (711.2) 28 (711.2)
Height

In (mm)

mins

40 (1016.0) 53 (1346.2)

6

(With an equal number of Battery & Power Modules,

in a non-redundant configuration)

%

<3 THD, linear load

<7 THD, non-linear load

110-125% for 10 min
126-150% for 10 sec

>151 – 200% for 2 cycles

39

Battery Run Times

8 Bay Frame

Internal and External (minutes)

Load Load

VA Watts 1 2 3 4 5 6 7 1 2 3 4 5 6
16,000 11,200 - - - 6 - - - 24 60 100 120 180 240
15,500 10,850 - - - 6 - - - 26 63 107 140 195 255
15,000 10,500 - - - 6 - - - 27 67 114 160 210 270
14,500 10,150 - - - 6 - - - 28 70 120 180 225 285
14,000 9,800 - - - 7 - - - 30 73 127 190 240 300
13,500 9,450 - - - 7 - - - 31 77 135 200 252 320
13,000 9,100 - - - 8 - - - 32 80 142 210 264 340
12,500 8,750 - - - 8 - - - 34 85 150 220 276 360
12,000 8,400 - - 6 9 12 - - 36 90 157 230 288 375
11,500 8,050 - - 6 9 13 - - 38 95 165 240 300 390
11,000 7,700 - - 6 10 14 - - 40 100 173 255 320 405
10,500 7,350 - - 7 10 15 - - 42 110 180 270 340 420
10,000 7,000 - - 7 11 18 - - 45 120 195 285 360 450

9,500 6,650 - - 8 13 18 - - 50 130 210 300 390 480
9,000 6,300 - - 9 14 19 - - 53 140 225 320 420 510
8,500 5,950 - - 9 15 20 - - 57 150 240 340 450 540
8,000 5,600 - 6 10 18 21 26 - 60 160 260 360 480 570
7,500 5,250 - 6 11 18 23 28 - 65 170 280 390 510 600
7,000 4,900 - 7 13 19 25 29 - 70 180 300 420 540 660
6,500 4,550 - 8 14 21 27 30 - 80 200 330 480 600 720
6,000 4,200 - 9 18 24 29 36 - 90 220 360 510 660 810
5,500 3,850 - 10 19 26 30 39 - 100 240 420 540 720 900
5,000 3,500 - 12 20 29 36 43 - 120 270 450 600 810 1,000
4,500 3,150 - 14 24 30 40 46 - 140 300 480 720 900 1,100
4,000 2,800 6 18 26 36 43 49 52 160 360 540 810 1,080 1,200
3,500 2,450 7 19 29 41 48 52 56 180 420 600 900 1,260 1,440
3,000 2,100 9 24 36 46 51 56 62 210 480 720 1,050 1,440 1,620
2,500 1,750 12 29 43 51 56 63 68 240 600 900 1,200 1,620 1,800
2,000 1,400 18 36 50 57 64 68 72 360 720 1,200 1,440 1,800 2,880
1,500 1,050 24 46 56 65 69 73 74 480 900 1,440 2,400 3,000 3,600
1,000 700 36 56 68 73 74 75 78 720 1,440 2,400 3,600 4,320 4,320

900 630 39 59 69 73 75 78 78 900 1,800 3,000 4,320 4,320 4,320
800 560 43 63 72 74 76 78 79 1,080 2,100 3,600 4,320 4,320 4,320
700 490 48 68 73 75 78 79 79 1,260 2,400 4,320 4,320 4,320 4,320
600 420 51 69 74 77 79 79 80 1,440 3,000 4,320 4,320 4,320 4,320
500 350 56 72 75 78 79 80 80 1,440 3,600 4,320 4,320 4,320 4,320

Note: Back-up times are in minutes and are based upon resistive loading at an ambient of 25°C, for non-redundant (standard)
configurations. Back-up times for external battery cabinets with chargers include internal battery modules that are equal to the
number of power modules in the UPS frame.

Quantity of

Battery Modules

External Battery Cabinets with charger

Quantity of

40

Battery Run Times

12 Bay Frame

Internal and External (minutes)

Load Load

VA Watts 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6
16,000 11,200 - - - 6 8 10 13 18 - - - 24 60 100 120 180 240
15,500 10,850 - - - 6 8 11 14 18 - - - 26 63 107 140 195 255
15,000 10,500 - - - 6 9 11 15 18 - - - 27 67 114 160 210 270
14,500 10,150 - - - 6 9 12 15 19 - - - 28 70 120 180 225 285
14,000 9,800 - - - 7 9 13 18 19 - - - 30 73 127 190 240 300
13,500 9,450 - - - 7 10 14 18 20 - - - 31 77 135 200 252 320
13,000 9,100 - - - 8 11 14 18 21 - - - 32 80 142 210 264 340
12,500 8,750 - - - 8 11 15 19 22 - - - 34 85 150 220 276 360
12,000 8,400 - - 6 9 12 18 20 23 26 - - 36 90 157 230 288 375
11,500 8,050 - - 6 9 13 18 20 24 27 - - 38 95 165 240 300 390
11,000 7,700 - - 6 10 14 19 21 25 29 - - 40 100 173 255 320 405
10,500 7,350 - - 7 10 15 19 23 27 29 - - 42 110 180 270 340 420
10,000 7,000 - - 7 11 18 20 25 28 30 - - 45 120 195 285 360 450

9,500 6,650 - - 8 13 18 21 26 29 31 - - 50 130 210 300 390 480
9,000 6,300 - - 9 14 19 24 27 30 36 - - 53 140 225 320 420 510
8,500 5,950 - - 9 15 20 25 29 31 38 - - 57 150 240 340 450 540
8,000 5,600 - 6 10 18 21 26 30 36 39 43 - 60 160 260 360 480 570
7,500 5,250 - 6 11 18 23 28 30 38 42 45 - 65 170 280 390 510 600
7,000 4,900 - 7 13 19 25 29 36 41 44 48 - 70 180 300 420 540 660
6,500 4,550 - 8 14 21 27 30 38 43 47 50 - 80 200 330 480 600 720
6,000 4,200 - 9 18 24 29 36 42 46 49 51 - 90 220 360 510 660 810
5,500 3,850 - 10 19 26 30 39 44 49 51 54 - 100 240 420 540 720 900
5,000 3,500 - 12 20 29 36 43 48 51 54 56 - 120 270 450 600 810 1,000
4,500 3,150 - 14 24 30 40 46 50 54 57 59 - 140 300 480 720 900 1,100
4,000 2,800 6 18 26 36 43 49 52 56 59 63 66 160 360 540 810 1,080 1,200
3,500 2,450 7 19 29 41 48 52 56 60 64 68 69 180 420 600 900 1,260 1,440
3,000 2,100 9 24 36 46 51 56 62 65 68 69 72 210 480 720 1,050 1,440 1,620
2,500 1,750 12 29 43 51 56 63 68 69 72 73 73 240 600 900 1,200 1,620 1,800
2,000 1,400 18 36 50 57 64 68 72 73 74 74 75 360 720 1,200 1,440 1,800 2,880
1,500 1,050 24 46 56 65 69 73 74 75 76 78 78 480 900 1,440 2,400 3,000 3,600
1,000 700 36 56 68 73 74 75 78 78 79 79 80 720 1,440 2,400 3,600 4,320 4,320

900 630 39 59 69 73 75 78 78 79 79 80 80 900 1,800 3,000 4,320 4,320 4,320
800 560 43 63 72 74 76 78 79 79 80 80 80 1,080 2,100 3,600 4,320 4,320 4,320
700 490 48 68 73 75 78 79 79 80 80 81 81 1,260 2,400 4,320 4,320 4,320 4,320
600 420 51 69 74 77 79 79 80 80 81 81 82 1,440 3,000 4,320 4,320 4,320 4,320
500 350 56 72 75 78 79 80 80 81 82 82 82 1,440 3,600 4,320 4,320 4,320 4,320

Note: Back-up times are in minutes and are based upon resistive loading at an ambient of 25°C, for non-redundant (standard)
configurations. Back-up times for external battery cabinets with chargers include internal battery modules that are equal to the
number of power modules in the UPS frame.

Quantity of

Battery Modules

External Battery Cabinets with charger

Quantity of

41

Warranty

Liebert Corporation extends the following LIMITED WARRANTY to the
purchaser and to its customer (collectively referred to as the "Purchaser"):
the enclosed Uninterruptible Power System (UPS) and components are
free from defects in materials and workmanship under normal use,
service, and maintenance FOR A PERIOD OF TWO YEARS FROM THE
DATE OF ORIGINAL PURCHASE from Liebert or the Liebert dealer or
retailer. THE FOREGOING WARRANTY IS THE ONLY WARRANTY
GIVEN AND NO OTHER WARRANTY IS PROVIDED, EXPRESS OR
IMPLIED, INCLUDING WITHOUT LIMITATION, MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. Certain aspects of
disclaimers are not applicable to consumer products acquired by
individuals and used for personal, family, or household purposes (as
distinguished from industrial or other purposes). Local laws may not allow
limitations on how long an implied warranty lasts, so the above limitation
may not apply to you. This warranty gives you specific legal rights, and
you may have other rights, which vary according to local law.
Certain repairs or services are the responsibility of the Purchaser and the
Purchaser is expected to pay for them. This warranty does not extend
either to products with removed or altered serial numbers or to any losses
or damages due to act of God or source external to the product, misuse,
accident, abuse, neglect, negligence, unauthorised modification,
alteration, or repair, use beyond rated capacity, or improper installation,
maintenance, application or use, including, without limitation, use in a
manner contrary to the accompanying instructions or applicable codes.
WARNING: Warranty is void if the battery is allowed to discharge below
the minimum battery cut-off point. The battery must be recharged every
four (4) to six (6) months when not in use.
If the UPS fails to conform to the above warranty within the two-year
warranty period, Liebert will repair or replace the UPS, at Liebert's option.
Repairs or replacements are warranted for the remainder of the original
warranty period. Purchaser, to make a warranty claim, should call to
obtain a Returned Goods Authorisation number and shipping instructions.
Return transportation costs to Liebert are the responsibility of the
Purchaser.

Due to the diversity of applications and considerations to be applied in
each case, Liebert does not recommend or knowingly sells its products for

such use.
The responsibility for risk assessment and management in applications
where the malfunction or failure of the UPS could be reasonably expected
to give rise to a risk of human life shall be the sole responsibility of the
purchaser. Liebert accepts no liability for consequential harm in such
applications.

LIMITED WARRANTY

"LIFE SUPPORT" APPLICATIONS

42

While every precaution has been taken to
ensure accuracy and completeness of this
literature, Liebert Corporation assumes no

for

damages resulting from use of this information

© 2000 Liebert Corporation. All rights reserved
throughout the world. Specifications subject to

® Liebert and the Liebert logo are registered

demarks of Liebert Corporation. All names

referred to are trademarks or registered

(7/00) Rev. 2

Nfinity™ Power System

208 V / 240 V 60 Hz

4 to 16 kVA

Technical Service and Support

Worldwide FAX tech support [phone] option #4

Worldwide Support. [phone] or 1-800-222-5877

The Company Behind The Products
With over a million installations around the

globe, Liebert is the world leader in
computer protection systems. Since it’s
founding in 1965, Liebert has developed a
complete range of support and protection
systems for sensitive electronics:

• Environmental systems: close-control air
conditioning from 1.5 to 60 tons.

• Power conditioning and UPS with power
ranges from 250 VA to more than 1000 kVA.

• Integrated systems that provide both
environmental and power protection in a
single, flexible package.

• Monitoring and control — on-site or remote
— from systems of any size or location

• Service and support, through more than 100
service centers around the world, and a 24­hour Customer Response Center.

U.S.A.

U.K. [phone]

France [phone]

Germany [phone]

Netherlands [phone]

E-mail [e-mail]

Web site http://www.liebert.com

Italy [phone]

1-800-LIEBERT

responsibility, and disclaims all liability
or for any errors or omissions.

change without notice.

tra
trademarks of their respective owners.

SL-23950

43